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Safety Regulator Give Nod to Restart of Hunterston B reactor

Power News - Published on Thu, 22 Aug 2019

Image Source: edfenergy
ONR has given permission for EDF Energy to re-start Reactor 4 at Hunterston B power station. The safety case for Reactor 4 has been subject to extensive scrutiny and testing: by our own internal Independent Nuclear Assurance, the Nuclear Safety Committee a body of independent industry experts and by the ONR themselves. Since the decision was made to take both reactors off line last year, we have completed the most extensive investigation of the reactor core that has ever been undertaken. This has provided us with valuable knowledge about condition of the graphite core. As part of this programme we have worked with the University of Bristol to confirm our understanding of how the core would react in the event of a major earthquake, of a magnitude never experienced in the UK.

Along with Bristol University, we have been working with leading consultancies and expert academics at other universities across the UK including Strathclyde, Glasgow, Manchester, Oxford, Sussex, Nottingham and Durham as well as with leading UK companies such as Fraser-Nash, Wood and SNC-Lavalin. We have also invested over 1000 person years into this research and invested over GBP 125 million in the programme.

As a result we have demonstrated that even in the most extreme conditions our reactors operate within large safety margins. In particular, all control rods would operate as they are designed to do and will safely shutdown the reactor in all circumstances. This has been agreed with the nuclear regulator, ONR, a statutory independent body which is representative of an industry whose regulatory regime is one of the most stringent and respected in the world.

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Posted By : Ratan Singh on Thu, 22 Aug 2019
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